Plastic 【Dual-Mode Universal Compatibility】 Wheel Mode: 3.15" wide groove fits most bed/sofa wheels (up to 2.95" diameter) Post Mode: 0.8" deep recess cup secures square/round legs (2.75" max width) Perfect for adjustable beds, dorm beds, and wheeled furniture 【Smart Stackable Design】Create 3"/5"/8" heights with interlocking risers, while nested storage reduces 68% space – ideal for seasonal height adjustments or compact dorm rooms 【Floor & Furniture Protection】 Dual safety system: ✓ 3mm shock-absorbing EVA top pad (noise reduction & anti-slip) ✓ Diamond-textured rubber base (scratch-resistant floor protection) Certified stable on carpet/hardwood/tile 【Pro-Grade 2000lbs Support】Triple-layer reinforced structure with steel-core pillars & military-grade ABS plastic, supporting 500lbs per riser (4-pack total 2000lbs) – 54% higher capacity than standard bed risers. 【Dorm-Safe Lifetime Warranty】 176°F heat-resistant & chemical-proof construction 30-second tool-free installation Backed by 5-year anti-break warranty + 24/7 US-based support At ZTON, we offer bed risers that are perfect for creating extra storage space in any home. Our bed risers are made of strong and sturdy materials, making them perfect for supporting your bed and mattress while also adding extra storage space. Bed risers can help keep your floors clean and free of clutter, as well as provide a safe and secure place to store items. The extra height created by our bed risers can also provide improved air circulation and ventilation under the bed, helping to keep allergens and dust away. With ZTON’s bed risers, you can create a stylish and organized bedroom that is a pleasure to spend time in.